This is a fun retrospective! I would recommend shopping at a party store or the kids party section at Walmart or Target for some super hero props to hand out with this retro. It will add an extra element of fun!
Set the Stage Activity - Super Power
Round robin and have the team answer: "What is your super power?"
Data Gathering Activity - Super Heroes
Superman: What was super about the sprint?
Dr. Strange: What was strange in the sprint?
Dare Devil: What didn't you or the team dare to do?
The Joker: What was bad in the sprint?
Closing Activity - Energy Level
Draw a battery charger that has full charge, half a charge and almost no charge. Then have the team members place a post it note on the energy level (charge) that represents their eagerness for the next sprint.